Waterproofing paper with celluloid and other materials



- ative substance.

UNITE STATES PATENT Farce.

WATERPROOFING PAPER W lTH CELLULOID AND OTHEli MATERIALS.

SPECIFICATION forming part of Letters Patent No. 251,410, dated December 27, 1881.

Application filed April 27, 1881. (No specimens.)

To all whom it may concern:

Be itkn own that LVVILLIAMB. CARPENTER, of Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Waterproofing Paper with Celluloid and other Materials, of which the 'following is a specification.

My invention relates to an improvement in the manufacture of water-proof paper; and it consists in combining asbestus with any suitable plastic water-proof material, such as celluloid ligppid, coroline, shellac, resin, or gums. These or pitherswill'be united with the ashestns either singly or in compounds of any of them, according to the kind of paper to be made; and any well-knownor suitable coloring material may be used, accordin g to the color required.

Asbestus is a well-known and cheap substance, and is capable of being worked into a pulp that may be felted and this combined with water-proof materials like those above named makes a very durable water-proof and nearly or entirely fire-proof paper, of great service, on which to write or print, or which may be used in certain departments of the mechanic arts where paper with these properties is required.

In the manufacture of this paper the ashestus will be reduced to a suitable fiber and the waterproof material or materials to powder. I s will herein speak of celluloid as the represent-p This is not dissolved, butground to a powder, either dry or in water, until itis of suitable fineness for the particular paper to be made. The asbestus and celluloid are then mixed together, until they are thoroughly incorporated, in water, forming a pulp, to be made into paper by any Well-known or suitable process or machinery not needful here to describe. After the paper has been made and has passed through the last of the heated rollers commonly used in DillflGF-lllilklllg, and

has been left to dry, I may add two steps to the process,according to the nature of the substance or substances used with the asbestus.

First. The paper may be put through a vapor bath, or atmosphere of alcohol, when the substance used-such as celluloidis capable of being dissolved byalcohol but when a resin or gum is used,on which alcoholhaslittle or no effect, then the vapor bath maybe of turpentine or an equivalent substance. The object of the vapor bath is to partially dissolve any of the materials which may not be thoroughly integrated by the action of the heated rollers above referred to.

Second. Then, after the vapor bath, the paper passed through the heated rollers will become more perfectly incorporated. The paper is then finished, and is ready for the various uses to which it may be applied.

The proportion of asbestus and other material will be regulated by experiment according to the kind of paper to be made.

I claim- 1. A paper made from asbestus and plastic waterproof, simple or compound substance or substances, such as celluloid,lignoid, coroline, shellac, resin, or gums, substantially as and for the purposes specified.

2. The process of making paper-pulp by mixing in water the plastic material with the as bestus, substantially as and for the purpose set forth.

3. The processof putting the paper through a vapor bath and afterward through heated rollers, substantially as and for the purpose specified.

WILLIAM CARPENTER.

Witnesses: I

HORACE HARRIS, S. R. STEADMAN. 

